Birds
Birds are the only animals with feathers. Obvious really, because feathers are designed for flight and animals that don't fly will not need feathers! All birds have feathers, all birds have beaks, all birds lay eggs, all birds have wings, all birds have a heart with four chambers and all birds are warm blooded.
There are many species of birds on planet Earth. They fly, they build nests, they lay eggs, many sing and many migrate thousands of miles every year.
Most birds build nests in which to lay their eggs and incubate their young. A nest can range from a shallow depression in the ground to a complex nest in tress or on cliffs, according to the bird species in question. Young birds know how to build their nests, they do not need adult birds to show then how to build a nest.
 Scarlet Ibis Author: Ltshears  |
 house sparrow Fir0002//flagstaffotos GNU Free Documentation License version 1.2 |
Birds have some unique features that make it easier for them to fly. An inner eyelid protects the eyeball when they are flying. Feathers have certain features that are critical for flight, for example, they are hollow to keep the weight down.
Many bird species migrate thousands of miles every year. Young birds follow this migration routine instinctively and know when to go and where to fly to, without following an adult bird or having been given a map!
 Barn owl Benjamint444 GNU Free Documentation License version 1.2 |
 Grass Owl adult Author:Author: Hayleyk |